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At some points, the oceanic crust bends downward and forms a deep-ocean trench. Then the oceanic crust sinks back into the mantle through a process called subduction.
Wiki User
∙ 8y ago
Wiki User
∙ 9y agoThe descending oceanic crust starts to melt. This is due to the presence of volatiles in the crust that reduce its melting point as well as the increased temperatures with depth. This can be thought of as a form of recycling of the crust.
Wiki User
∙ 13y agosubdution
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Deep ocean trenches are evidence for?
Deep ocean trenches are typically the evidence of the collision of tectonic plates. This collision is often known as subduction.
What are deep ocean trenches associated with?
Deep ocean trenches are associated with subduction zones where an ocean plate descends into the asthenosphere. The Ocean plate is heavier than a Continental plate which causes the Ocean plate to slide beneath the Continental plate. As the Ocean plate descends, a deep ocean trench is formed.
How do ocean ridges and deep-sea trenches support the theory of sea floor spreading?
Sea Floor spreading has to do with the crust forming at ocean ridges and being destroyed at deep sea trenches.
What happens at deep-ocean trenches in an oceanic-continental subduction zone?
they occur because a big japaneese fart master sat on the ocean and made it have a bigger crack than his. the crack goes deep under the land it is pushed under and forms a barrel cave for bugs to sit in while they eat at the ground.. heheh
Which basin contains many deep sea trenches?
the Pacific Ocean with a few in the Indian Ocean.
What happens to the ocean floor at the deep ocean trenches?
what happens is the ocean floor does not just keep spreading.instead, it sinks beneath deep underwater canyons called deep- ocean trenches
What happens at deep-ocean trenches?
subdution
What happens when continental and continental collide?
Deep ocean trenches form
What are deep-ocean trenches?
Deep ocean trenches are deep slits in the middle of the ocean. The pressure inside these trenches is unbearable. long, curved valleys along the edges of the ocean basin
Where do giant squids live in deep oceans trenches or mid ocean trenches?
Giant squid primarily live in deep ocean trenches.
What ocean has many deep valleys or trenches?
Trenches
How deep do squid live in the ocean?
They live in deep trenches in the ocean.
Why does deep-ocean trench occur?
At deep-ocean trenches, subduction allows part of the ocean floor to sink back into the mantle. The ocean floor does not just keep spreading. Instead, it sinks beneath deep underwater canyons called deep-ocean trenches. Where there are trenches, subduction takes place.
Why does deep ocean trench occur?
At deep-ocean trenches, subduction allows part of the ocean floor to sink back into the mantle. The ocean floor does not just keep spreading. Instead, it sinks beneath deep underwater canyons called deep-ocean trenches. Where there are trenches, subduction takes place.
Deep ocean trenches are evidence for?
Deep ocean trenches are typically the evidence of the collision of tectonic plates. This collision is often known as subduction.
How deep is a ocean trench?
Some ocean trenches can be as deep as 10,971 m (35,994 ft).
What is deep-trenches?
a deep-ocean trench is a portion of the earth crust
